TrueNAS HTTPS WebUI

Networking & Firewalls
1

I use tailscale serve to access my TrueNAS services and apps securely with certificates and I works good for immich etc.

However when I run tailscale serve --bg --https=443 443 for the main WebUI I get the following error:

“400 Bad Request, The plain HTTP request was sent to HTTPS port”

Any ideas?

2

It’s not best practice to reverse proxy TN web UI.

3

I think the issue is that the TrueNAS web ui runs HTTPS locally (with a self-signed cert), but Tailscale Serve defaults to forwarding as plain HTTP.

Try specifying the backend protocol: tailscale serve --bg --https=443 https+insecure://localhost:443